Process of treating pigments for paints.



*To all whom it mat concern:

UNITED ST TES PATENT f OFFI E.

WILLIAM-1N.,BLAKEMAN,|JR., or NEw YoRK, N. Y.

P ooEss 04F TREATING PIIGMENTS roR PAINTS.

srncrnlcarrolvformiag part of Letters Patent i 702,174, datedJune 10, 1902. "s en Nd. 734,698- (No specimens.)

ri ness. net October 25. 1899.

Be itknovtfn that I, WILLIAM NQBLAKEMAN,

ments for Paints,'whichinvention "is fully setforth-in the following specification.

Theobject ofthis invention is to treat pi'g-' ments used in'the manufacture of paints in; such a mannerthat' theyshall exhibit great "body and improved drying properties when ground in oil. y v v In my 'applicationfor-Letters Patent filed May 15, 1899, SerialNo. 716,913, I haveidescribed a process'for imparting bod yorspread ing power to oil'pigments by incorporating with the pigment before grinding it in oil an t n o b yv n a n a ents- I have now discovered that if in addition to such body-giving a'gentor agents a separate 7 drier be incorporatedwith the pigmentthe 'body'when ground in oil, but will 3180 ,ex-

pigmentso treated will not only exhibit great hibit improved drying properties. As described-fin my said application, many. Substances are capable of use as aggregating or body-giving agents, among them being resins,

gums, gumresins, 'balsarn's, farina, 'fecnla,

a a bum n, u e .7 ge a a e c lktnsfi. y up lu o dextrine, British gum, spermaceti, stearine, stea'ric acid,and other fatty acids, oils, waxes,

the heavier liquid and solid paraffins, glyc- Iacetate of zinc, sulfate of zinc, saltpeter,

erin, many metallic oxidsand other salts, as the lead oxids, the alums, acetate of lead,

chlorid of ammonium, chlorid of sodium, and the like, Although any oneor moreof these substances may be employed in carrying out the process hereindescribed, I prefer to employ such agents as stearicaoid or stearinewax, spermaceti, beeswax, carnauba wax, pine-wax, palm-wax, mineral wax, paraffin- V wax, and ozocerite; but whatever the bodygiving agent selected I attenuate the same in asuitablesolvent' or volatile Vehicle before incorporating it with the pigment, and as attenuating vehicles water, the alcohols,spirits, v ethers, spirits of turpentine, the naphtha group of paraffins, milk of lime, solutions of v the alkaline carbonates, and borax solutions may, among 0thers,be employed. The selec-- tion of a vehicle can be readily made by any I one skilled in thisbranch of chemistry. Jr, of theb'oroughof Manhattan, in thecity, 'county,"a nd State of New York, have i'nvent ed a new and useful Processof TreatingPig,

The driers which may be usedfin carrying out myprocessembrace ,a large vvarietyof substances. The term .fdrier? as used herein is intendedto include all substancesof ani-' mal or vegetable origin which willabsorb 'oxygen and pass from aclower to a. higher state of oxidation and transmit or carry their oxygentooxidizable matter with which they may come in contact, and the term also. in-.

cludes all, metallic or mineral substances which carry oxygen in combination and will yielda portion of suchoxygen to-anyoxidizahle matter with which said substances may be incorporated. Examples ofidriers arethe drying-oils, the .turpentines, the resin acids, I

theacid resins, and the ,metallic oxide and salts. .Oneor more ofthese driers may be used in my process or a commercial liquid drier, if desired. I prefer, however,,to em;-

ploy the salts of manganese, such assu'lfate offmanganese,,manganous sulfate, acetate of manganese,borateofmanganese,and the like. ,Whatevegagent be .selectedas-a drier I attenuate it in a volatile vehicle beforeincorporating it with. the pigment, andtheselection of asuitable solvent or vehicle for a If it be desiredrto use one, of vthe commercial liquid driers, kn own as japans and the like, the commercial drier selected, if itbe a turpentine ,drjer, naybea'ttenuated' .withone of the naphtha group o f parafiins andthen incorporated with the pigment and the naphtha then. evaporated and recovered particular driercan be readily made by any 7 one skilled in 'theart; Water, the alcohols, spirits, ethers, spirits of;.t urpen tine, andthe V naphtha group of paraffins are'allavailable for use. '8 5 througha condenser. Ifaepirit drierbe selected, it may be attenuatedwithalcohol,

attenuate it in a suitable solvent or'vehicle;

third, incorporate this solution with the pigment, and afterward evaporate the vehicle.

I then select an aggregating or body-giving agent, attenuate it inasuitable solvent or vehicle, incorporate this solution with the pigment, (previously treated with the d rier,) and then evaporate the vehicle.

Asapi'actical illustration of my process the following may be given: I select sulfate of manganese as a drier and dissolve one-fourth to one-half of one per cent. in one hundred parts of water; second, incorporate this solution with one hundred parts of pigment-say zinc-white-and, third, evaporate the water with a gentle heat. I'then select parafiin wax (of about 115 to 120 Fahrenheit melting-point) as an aggregating or body-giving agent and dissolve one'half of one per cent. in one hundred parts of any of the naphtha group of parafiins; second, incorporate this solution with the pigment, (already combined with the drier,) and, third, evaporate the naphtha.

I do not confine myself to the steps named, as the great variety of pigments to be treated and the body-giving agents and driers to be used may demand changes to suit each case as practice shall dictate. Thus the bodygiving agent may first be combined with the pigment and the drier then added, or in some cases the body-givingagcnt and the drier may be incorporated at one operation. For the same reasons I do not con fine myself to the use of any particular Volatile vehicle or solvent or to the use of separate solvents for the bodygiving agent and drier, as in some cases it may be found advisable to use a common solvent, such as the alcohols or spirits. Having due regard, however, to the economies of the process, the above method of manipulation will be found to give very satisfactory results, and any changes will readily suggest themselves to those skilled in the action and capacity of solvents. If it be desired to recover the solvent in any case, it may be done through the well-known condenser.

The percentage of body-giving agent and the percentage of drier to pigment may be regulated as practice shall dictate. Heat may be applied whenever found advisable.

Zinc-white, white lead, or any other pigment may be treated by my process, with the result that such pigment will be improved in two respects. First, it will by reason of the treatment with the body-giving agent exhibit greater body when ground in oil, and, second, by reason of the treatment with the drier it will cause the paint to dry in at least one hours less time than a paint in which the drier is added to the oil. If zinc-white be treated in this way, five parts of it will be found equal to ten parts of Dutch lead, and its usual slow-dryin g properties will be greatly accelerated.

Certain pigments, among them zinc-white, treated with a body-giving agent and a separate drier, as herein described, and then ground in a non-drying oil, such as cottonseed oil, will produce the remarkable effect of imparting drying properties to the nondrying oil, as described in my application for patent filed January 2, 1900, Serial No. 59,

and a paint compound so formed will,although made with a non-drying oil, dry and harden in a perfectly satisfactory manner and will also exhibit great body or spreading power.

Having thus fully described my invention, I claim 1. The process ofimparting to oil pigments, body or spreading power and improved drying properties, which consists in attenuating in a volatile vehicle or vehicles, a drier and a separate body-giving agent, thenincorporating such attenuated agents with the pigment, and then evaporating the vehicle.

2. The process of imparting to oil pigments body or spreading power and improved drying properties, which consists in attenuating in a volatile vehicle or vehicles, a drier and a separate body-giving agent, then incorporating such attenuated agents with the pigment, then evaporating the vehicle, and then grinding the pigment in oil.

The process of imparting to oil pigments body or spreading power and improved drying properties, which consists in attenuating in a volatile vehicle or vehicles, a salt of manganese and a separate body-giving agent, then incorporating such attenuated agents with the pigment, and then evaporating the vehiclc.

4. The process herein described of imparting body and drying properties in oil to oil pigments, which consists in attenuating in a volatile vehicle orvehicles a drier and a paraffin-wax, incorporating such attenuated substances with the pigment, and evaporating excessive moisture before the pigment is ground in oil.

5. The process herein described of imparting body and drying properties in oil to oil pigments which consists in attenuating in a volatile vehicle or vehicles a salt of manganese and a paraffin-wax, incorporating such attenuated substances with the pigment, and evaporating excessive moisture before the pigment is ground in oil.

6. The processof imparting to oil pigments body or spreading power and improved drying properties, which consists in attenuating a drier in a volatile vehicle, incorporating the solution with the pigment, and evaporating the vehicle; then attenuating a separate bodygiving agent in a volatile vehicle, incorporating this solution with the combined pigment and drier, and evaporating the vehicle.

7 The process of imparting body or spreading power and improved drying properties to zinc-white pigment, which consists in attenuating in a volatile vehicle or vehicles a drier and a separate body-giving agent, then incorporatin g such attenuated agents with the zincwhite, and then evaporating the vehicle.

8. The process of imparting body or spreading power and improved drying properties to zinc-white pigment, which consists in attenuating in a volatile vehicle or vehicles, a drier and a separate body-giving agent, then incorporating such attenuated agents with the zincwhite, then evaporating the vehicle, and then grinding the pigment in oil.

9. The process'of imparting body or spreading power and improved drying properties to zinc-white pigment, which consists in attenuating in a v'olatile vehicle or vehicles a salt of manganese and-a separate bodygiving agent, then incorporating such attenuated 7 agents with the zinc-white, and then evaporating the vehicle.

' 10. The process herein described of imparting body and drying properties in oil to zincwhite pigment, which consists in attenuating in a volatile vehicle or vehicles a drier and a paraffin-wax, incorporating such attenuatedsubstances with the zinc-white, and evapo rating excessive moisture before the pigment is ground'in' oil. I

11. Theproce'ss hereindescribed ofimparting body and drying-properties in oil to zincwhite pigment, which consists in attenuating in a volatile vehicle or vehicles, a saltof'manganese and a paraffin-wax, incorporating such attenuated substances with the zinc-white, and evaporating excessive moisture before the pigment is ground in oil.

, WM. N. BLAKEMAN, J R.

Witnesses:

FRANCIS P. REILLY, G. A; STIMPSON. 

